Nanoporous platinum: synthesis via dealloying

POSTER

Abstract

Nanoporous structures with high active surface areas are critical for a variety of applications. We demonstrate the synthesis of nanoporous platinum thin films by dealloying. Dealloying is a corrosion process in which one or more elements are selectively removed from an alloy leading to a 3-dimensional porous structure of the more noble element. Cu$_{80}$Pt$_{20}$ films ($\sim $100--250~nm thick) are formed by cosputtering and dealloyed in aqueous H$_{2}$SO$_{4}$ solutions to selectively remove copper while allowing self-assembly of platinum into a nanoporous structure. The platinum nanoporous layers have a pore size of 20--100~nm, a surface area enhancement $>$20 times. Applications for these structures range from high surface area electrodes for biomedical sensors to use as skeletal structures for fundamental studies (e.g. low temperature heat exchangers or sensitivity of surface diffusivity to chemical environment). In this work we will review our current method of synthesis of the alloy thin film and include our most recent results demonstrating porosity in Pt.

Authors

  • A.N. Behkami

    Kent State University, Reed College, Western Washington University, Washington State University, Department of Physics, University of Idaho, Department of Physics, Whitman College, SciPrint.org, STScI, Physics Dept., Montana State University, Bozeman, MT 59717, Chemistry Dept., Montana State University, Bozeman, MT 59717, Physics Dept., Montana State University, Bozeman, MT 59717; Institut fuer Physik, Technical University Ilmenau, 98693 Ilmenau, Germany, Centre College, Islamic Azad University, Department of Physics, Fars Science and Research Center

  • A.N. Behkami

    Kent State University, Reed College, Western Washington University, Washington State University, Department of Physics, University of Idaho, Department of Physics, Whitman College, SciPrint.org, STScI, Physics Dept., Montana State University, Bozeman, MT 59717, Chemistry Dept., Montana State University, Bozeman, MT 59717, Physics Dept., Montana State University, Bozeman, MT 59717; Institut fuer Physik, Technical University Ilmenau, 98693 Ilmenau, Germany, Centre College, Islamic Azad University, Department of Physics, Fars Science and Research Center

  • A.N. Behkami

    Kent State University, Reed College, Western Washington University, Washington State University, Department of Physics, University of Idaho, Department of Physics, Whitman College, SciPrint.org, STScI, Physics Dept., Montana State University, Bozeman, MT 59717, Chemistry Dept., Montana State University, Bozeman, MT 59717, Physics Dept., Montana State University, Bozeman, MT 59717; Institut fuer Physik, Technical University Ilmenau, 98693 Ilmenau, Germany, Centre College, Islamic Azad University, Department of Physics, Fars Science and Research Center